Are you considering the 75 because of space or you think it is a performer ?
A little Uniden PRO520 with or without a Power Mic will out perform most stock CB Radios.
You do need to get a good antenna (Wilson, FireStik) and coax (Time LMR, Belden) before the best or the worst CBs will get out.
If space is the problem then the PRO520 can be mounted in a lot of different location, it is small and will fit where other won’t.
You will need an External Speaker for either CB.